An EMC filter is a key electronic component used to suppress electromagnetic interference in electronic equipment.

It mainly consists of passive components such as inductors, capacitors, and resistors, utilizing the response characteristics of these components to signals of different frequencies to achieve frequency selective filtering.

Its core function is to build a frequency-selective barrier along the interference propagation path, effectively suppressing conducted electromagnetic interference (EMI), thereby ensuring that the equipment neither interferes with others nor is interfered with by others.

In high-frequency, complex electromagnetic environments such as new energy, automotive electronics, and industrial automation, EMC filters have become a critical component for products to pass international standard certifications such as CISPR and IEC.